Since some of the cats peed always on our doorstep on the floor and I as always a rubber mat have laid so that the floor is not even more damage, I was fed up and wanted to try something else, so that the rubber mat from the front door comes off. So I placed the box on the front door and after the cats have then repeatedly tried to venture into the tin, they have given up but then quickly and now hold a decent distance from the door. Now I hope that this remains so, and we can eventually refrain entirely from rubber mat .... and find the cat no Pinkel corner ...
But I will report again after about 4 weeks, since I previously had only one day experience with it.
So far, I can recommend the can in any case.